For use in jewellery, most opal is cut and polished to form a cabochon, a convex shape that maximises the viewing angles through which an opal's play of colour can be observed. "Natural" opal refers to …

Mar 5, 2025 · Opal is a fascinating mineral known for its unique play of colors and diversity. There are many types of opal, each with distinct characteristics that make them special. For example, boulder …

Oct 8, 2025 · Opal, silica mineral extensively used as a gemstone, a submicrocrystalline variety of cristobalite. In ancient times opal was included among the noble gems and was ranked second only …

Oct 1, 2025 · With a rainbow of hues seemingly trapped within, Opal is one of the most colourful of the gems. So, let's find out more about this fascinating beauty.

Apr 21, 2025 · Opal is a hydrated amorphous form of silica (SiO₂·nH₂O) containing between 3-21% water within its mineral structure. Unlike crystalline gemstones that have orderly, repeating atomic …

Opal is the product of seasonal rains that drenched dry ground in regions such as Australia’s semi-desert “Outback.” It is known for its unique display of flashing rainbow colors.

Primarily sourced from Australia, particularly Coober Pedy and South Australia, white opal is more abundant than black opal, making it a more affordable yet equally captivating option. Its value …

Explore the enchanting world of opal, a gemstone known for its mesmerizing play-of-color and unique beauty. Learn about its formation, properties, famous finds, types of opal, and how to care for this …

It evokes images of brightness, brilliance, shimmer, and sparkle. This term emerged because nothing else could quite describe the dazzling play-of-color in opals: think flaming reds against a milky …

Opal is brittle, heat sensitive, and breaks and scratches easily; additionally, some varieties self- destruct through the loss of water. Even with these drawbacks, opal's unsurpassed beauty guarantees its …